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Deployment Guide
AX Series with
Microsoft Office Communications Server
T
able of Contents
Deployment Guide for Microsoft Office Communications Server 2007
DEPLOYMENT GUIDE
AX Series with MicrosoOffice Communicaons Server
Introducon......................................................................................................................... 1
Prerequisites & Assumpons ................................................................................................. 1
Enterprise Deployment Example............................................................................................ 2
Configuring AX for HTTPS (444) port on MicrosoOffice
Communicaons Server 2007................................................................................ 3
Configuring HTTPS Health Monitor........................................................................................ 3
Configuring Real Servers for OCS ........................................................................................... 4
Service Group Configuraon.................................................................................................. 6
Templates Configuraon........................................................................................................ 7
Configuring HTTP Template ........................................................................ 7
Configuring TCP Proxy Template................................................................. 8
Imporng of SSL Cerficate ........................................................................ 9
Configuring SSL Server Template .............................................................. 10
Configuring SSL Client Template ............................................................... 11
Configuring Virtual Server for port 444 (HTTPS).................................................................. 12
Configuring AX for SIP (5061) port on MicrosoOffice
Communicaons Server 2007.............................................................................. 14
Configuring Real Servers for OCS ......................................................................................... 14
Service Group Configuraon................................................................................................ 15
Template Configuraon ....................................................................................................... 16
Configuring TCP Template......................................................................... 16
Configuring Source IP Persistence Template............................................. 17
Configuring Virtual Server for port 5061 (SIP)...................................................................... 18
Summary and Conclusion ....................................................................................... 20
Performance by Design
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Deployment Guide for Microsoft Office Communications Server 2007
Introducon
This deployment guide contains configuration procedures for AX Series server load balancers to support
Microsoft Office Communications Server 2007 (OCS).
OCS is the first Microsoft product to combine enterprise-ready IM (instant messaging), presence, confer-
encing, and VoIP (Voice over IP) telephony in a fully integrated unified communications solution. Office
Communications Server 2007 provides richer presence capabilities, rich multimedia experiences that
include data collaboration, group IM, audio and video, and multiparty audio conferencing, and improved
deployment and management than its predecessor, Microsoft Office Live Communications Server 2005.
For more information on OCS, visit:
http://office.microsoft.com/en-us/communicationsserver/default.aspx
The AX Series with its Advanced Core Operating System (ACOS) has been designed specifically for ap-
plications such as OCS, providing better robustness in failover situations, load balancing VoIP users’ ses-
sions for better performance and scalability, offloading processing for security, and performing intelligent
load sharing for Web based clients’ access for OCS services.
Prerequisites & Assumpons
A10’s AX platform should be running software version 2.0 or later.• It is assumed that users have some basic configuration familiarity with both AX as well as OCS• administration.
The AX can be configured in one armed mode or routed mode.•
Performance by Design
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Deployment Guide for Microsoft Office Communications Server 2007
The configurations that are in this deployment guide can be used for OCS setups and topologies for cli-
ents’ access using a HTTP Web browser for OCS services, and for VoIP services of OCS based on the
SIP configuration.
Enterprise Deployment Example
For High Availability Enterprise deployment supporting mission-critical IM and conferencing internally
as well as providing external access, the following Microsoft’s OCS reference topology is used as an
example.
This reference topology is well positioned to scale if the need for external access becomes more critical.
To scale, you add additional computers that are running the same server roles and connect them to the
AX load balancer.
Figure 2.1 Office Communications Server Reference Topology
Figure 2.1 Office Communications Server Reference Topology
Performance by Design
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Deployment Guide for Microsoft Office Communications Server 2007
The configuration steps in this document are based on AX Series Software Release 2.4 and Microsoft
Office Communications Server 2007 Enterprise Edition.
Configuring AX for HTTPS (444) port on MicrosoOffice
Communicaons Server 2007
To configure AX for Microsoft Office Communication Server 2007, you need to configure the following
steps on AX.
Configure HTTPS Health Monitor• Configure OCS (Office Communications Server)• Configure Service Group• Configure Template• Configure Virtual Server•
Configuring HTTPS Health Monitor
In these steps we will configure the HTTPS health check for port 444 on OCS.
To configure HTTPS health monitor:
1. Select Config Mode > Service > Health Monitor
2. Click Add
3. On the Health Monitor tab, enter a name for the monitor in the Name field. In this example, we type
“OCS-HTTPS-HM”
4. In the Method section, select HTTPS from the Type drop-down list
5. In the Port field, port number enter “444”
6. Configure optional fields as required for your deployment. In this example, the default health monitor
settings are used
7. Click OK to finish configuration of the health monitor. The health monitor appears in the health monitor
table
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Deployment Guide for Microsoft Office Communications Server 2007
Figure 2.2 Health Monitor Configuration
Figure 2.2 Health Monitor Configuration
Configuring Real Servers for OCS
In this step we configure Microsoft OCS real server with service port 444. We configure HTTPS health
monitor on the service port.
To configure a real server:
Select1. Config Mode > Service > SLB
Select2. Server on the menu bar
Click3. Add. The General tab appears
In the4. Name field, enter a name for the server. In this example, the name is “OCS-07”
In the5. IP Address field, enter the IP address of the server. In this example we type
“192.168.111.1”
In the6. Health Monitor drop-down list, leave the default health monitor for Layer 3, which is
ping to the server’s IP address
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Deployment Guide for Microsoft Office Communications Server 2007
Figure 2.3 Real Server Configuration
Figure 2.3 Real Server Configuration
In the7. Port field, enter the number of the service port on the real server. In this example, the
port number is “444”
In the8. Health Monitor drop-down list for the port, select the previously configured HTTP health
monitor “OCS-HTTPS-HM”
Figure 2.4 Real Server Port Configuration (Continuation)
Figure 2.4 Real Server Port Configuration (Continuation)
Click9. Add to add the port to the port list for the server
Click10. OK. The real server appears in the server table
Repeat this procedure for each of the Microsoft Office Communications servers11.
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Deployment Guide for Microsoft Office Communications Server 2007
Service Group Configuraon
To configure a service group:
Select1. Config Mode > Service > SLB
Select2. Service Group on the menu bar
Scroll down to click3. Add. The Service Group tab appears
In4. Name field, enter name of service group. In this example, the name is “ocs-https”
In the5. Algorithm drop-down list, select the preferred load-balancing method. You can control
the load on each server by selecting the appropriate type of load balancing methods. For this
configuration, Round Robin is used
In the Server section, select a configured real server from the6. Server drop-down list
In the Port field, enter the port7. “444”
Click8. Add. Repeat steps 6-8 for each real server
Click9. OK. The new group appears in the service group table
Figure 2.5 Service Group Configuration
Figure 2.5 Service Group Configuration
Performance by Design
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Deployment Guide for Microsoft Office Communications Server 2007
Template Configuraon
HTTP Template• TCP-Proxy Template• Client SSL Template• Server SSL Template•
Configuring HTTP Template
Configuring HTTP Template
Select1. Config Mode > Service > Template
Select2. Application > HTTP from the drop down menu bar. The Template >> HTTP >> List
page appears
Click3. Add. The Template >> HTTP >> Create page appears
Enter a name for the template in the4. Name field. In our example we type “OCS-HTTP”
Select or enter values for the template options you want to use. In this example, the default5. values are used for the remaining options
Click6. OK to finish configuration and the template now appears in the HTTP template list
Figure 2.6 HTTP Template Configuration
Figure 2.6 HTTP Template Configuration
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Deployment Guide for Microsoft Office Communications Server 2007
Configuring TCP Proxy Template
Configuring TCP Proxy Template
TCP-proxy templates control TCP stack settings such as the idle timeout for TCP connections. We will
configure this template on a virtual server port later in the deployment guide.
To configure a TCP-Proxy template:
Select1. Config Mode > Service > Template
Click2. TCP Proxy on the top menu bar
Click3. Add to configure new template
In the4. Name field, enter a name for new template. In this example we type “OCS-TCP-Proxy”
In the5. Idle Timeout field, the default value of “600” seconds is used. The other default settings
are also used in this example
Click6. OK
Figure 2.7 TCP Proxy Template
Figure 2.7 TCP Proxy Template
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